Tech & Science : Did Hitchhiking Sugars on Asteroids Help Jumpstart Life on Earth? - - PressFrom - Australia
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Tech & Science Did Hitchhiking Sugars on Asteroids Help Jumpstart Life on Earth?

03:46  20 november  2019
03:46  20 november  2019 Source:   popularmechanics.com

What Is A ‘Mass Extinction’ And Are We In One Now?

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Did all the parts arrive at the same time? Did sugars exist and hang around for millions of years before amino acids finally came, or vice versa? Mars is very like Earth in many ways but its smaller mass and colder orbit means it could have run out of any geothermal juice a long, long time ago, missing

Life on Earth . Life on Earth . Earth as we all know is the only planet to support life though these days it is open to debate. Get kids to use the free printable worksheet to list the factors that support life on Earth . You can also try out other free worksheets for kids on a range of topics.

a close up of a black background: Scientists found sugars while analyzes meteorites, adding to a popular theory about how life began on Earth.© NASA/Goddard/University of Arizona Scientists found sugars while analyzes meteorites, adding to a popular theory about how life began on Earth.

The first known evidence of sugars on a meteor has been found by researchers from Japan and from NASA’s Goddard Space Flight Center, NASA reports. The research team says that the combination of these sugars with previously discovered materials like amino acids could mean that all the building blocks of the beginning of life on Earth originated in space. The team specifically found ribose, which is the ribo in ribonucleic acid (RNA), considered to be older and more foundational than DNA.

Politicians reject push to make Health Star Ratings mandatory amid customer confusion

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Where did all the Earth -impacting asteroids come from? Astronomers think Jupiter formed farther out than it currently lies, then migrated inward, perhaps nearly as far "The information we're going to gain from OSIRIS-REx — it's really going to help pull back the curtains on the origin of this planet, on the

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“The team discovered the sugars by analyzing powdered samples of the meteorites using gas chromatography mass spectrometry, which sorts and identifies molecules by their mass and electric charge,” NASA reports. The two meteorites that they dusted into Fun Dip are named NWA 801 and Murchison, and both are heavy in carbon that would also be required for life to begin.

But that carbon is heavy carbon instead of the “light” carbon we typically see on Earth—think “heavy water” versus water, in both cases meaning the heavy version has larger, heavier molecules. This tells scientists that the carbon portion is strictly from space. Could the sugars have jumped aboard the meteorites when they struck Earth? Scientists don’t think so, and the heavy carbon is a good piece of evidence.

If aliens exist, their home systems may be totally unlike our own

  If aliens exist, their home systems may be totally unlike our own Earth is the only planet we know of that currently hosts life in any form. Because of that, it’s tempting to assume that, in the search for extraterrestrial life, we should be hunting for solar systems like our own. That might not be true, and a new study suggests that if we hope to find aliens, we should be targeting systems with more than one star. The research, which was published in the Astrophysical Journal, focused on the behavior of Earth-like worlds in binary star systems. The heart of a binary system includes two stars that orbit one another.

Where did all the Earth -impacting asteroids come from? Astronomers think Jupiter formed farther out than it currently lies, then migrated inward, perhaps nearly Some of the countless bodies flung inward undoubtedly hit Earth — thankfully for humanity and all other life -forms that have ever existed on the

Late last year, astronomers detected the first known interstellar asteroid , dubbed ‘Oumuamua. New research suggests these exotic objects are more abundant than we thought, an observation that boosts the panspermia hypothesis—the idea that asteroids seeded life on Earth .

A model of the molecular structure of ribose sits next to an image of the Murchison meteorite. © NASA/Yoshihiro Furukawa A model of the molecular structure of ribose sits next to an image of the Murchison meteorite.

This discovery is not evidence of the wonderful but outlandish theory of panspermia, which posits that actual living things or genetic material came to Earth from somewhere else in space. The truth is likely both more prosaic and more wondrous, because Earth existed for a billion years before any signs of life emerged, during which the critical pieces of chemistry could have arrived at intervals on meteorites. Like the Blues Brothers, they had to wait until the whole band was back together.

Did all the parts arrive at the same time? Did sugars exist and hang around for millions of years before amino acids finally came, or vice versa?

The scientists have more meteorites to powder and study, but their immediate next step might reinforce that these sugars are from outer space. Molecules can have a quality called chirality, meaning they come in two versions that are mirrors of each other. These are called left-handed and right-handed molecules. On Earth, all amino acids are left handed, and all sugars are right handed. If the sugars from space are left handed, that will demonstrate their space origins.

Saturn’s moon Titan is like Earth, but insane

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JumpStart Adventures 6th Grade: Mission Earthquest is a game created by Knowledge Adventure in the JumpStart series. In this game A.R.T., a computer with artificial intelligence, has gone haywire, and now wants to "redesign the chaotic system that is Earth ".

Why do asteroids hit Earth ? Space is really empty and big, but there is also a lot of stuff out there, and Earth is a big target with big gravity, so things The asteroid that led to the extinction of the dinosaurs and 70% of the species on Earth was 10 to 15 km (6 to 9 mi) in diameter. It hit off what is now the

At the end of their paper, the team conclude, “[T]his work provides evidence that prebiotic sugars could have been delivered to ancient environments on the Earth and possibly on Mars.” Mars is very like Earth in many ways but its smaller mass and colder orbit means it could have run out of any geothermal juice a long, long time ago, missing the viability window for life that developed on Earth.

The scientists also explain that finding intact ribose and other sugars after some amount of time traveling through space shows that these molecules are capable of making that trip and “surviving” it in the chemical sense. And their discovery of much more ribose than of any deoxyribose (the D in DNA) points to the theory that RNA is in fact the ancestor of DNA.

This Is Our Best Glimpse Yet Of An Interstellar Comet .
A telescope in Hawaii has captured a close-up view of comet 2l/Borisov—only the second known interstellar visitor to our Solar System. This stunning view of comet 2l/Borisov, or simply interstellar comet Borisov, was captured by the Low-Resolution Imaging Spectrometer fitted to the W. M. Keck Observatory in Hawaii, according to a press release. Yale astronomers Pieter van Dokkum, Cheng-Han Hsieh, Shany Danieli, and Gregory Laughlin acquired the image on November 24, 2019.

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